▎ 摘　　要

NOVELTY - Graphene modified polyethylene flame retardant composite material comprises 55-65 pts. wt. polyethylene substrate, 3-5 pts. wt. modified graphene, 13-16 pts. wt. silicon phosphorus compound flame retardant, 13-20 pts. wt. synergistic reinforcement, 10-15 pts. wt. filler, 5-8 pts. wt. plasticizer and 1-3 pts. wt. additive, modified graphene is treated with terpyridinium trichloride, the weight ratio of the two is 1:10-15, the silicon phosphorus compound flame retardant particle diameter is 5-10 mu m, modified graphene is treated with terpyridinium trichloride and the weight ratio is 1:10-15. USE - Used as graphene modified polyethylene flame retardant composite material. ADVANTAGE - The composite material: has simple preparation process; environmentally friendly; satisfies the mechanical strength requirements; has flame retardant effect; enlarges the use range of the polyethylene. DETAILED DESCRIPTION - Graphene modified polyethylene flame retardant composite material comprises 55-65 pts. wt. polyethylene substrate, 3-5 pts. wt. modified graphene, 13-16 pts. wt. silicon phosphorus compound flame retardant, 13-20 pts. wt. synergistic reinforcement, 10-15 pts. wt. filler, 5-8 pts. wt. plasticizer and 1-3 pts. wt. additive, modified graphene is treated with terpyridinium trichloride, the weight ratio of the two is 1:10-15, the silicon phosphorus compound flame retardant particle diameter is 5-10 mu m, modified graphene is treated with terpyridinium trichloride, the weight ratio of the two is 1:10-15, the silicon phosphorus complex flame retardant has a particle size of 5-10 mu m, synergistic reinforcement is carbon nano tubes and modified titanium dioxide in accordance with the weight ratio of 1:10-13 mixed, the carbon nano tubes are modified multi walled carbon nano tubes, modification step first, multi walled carbon nano tubes with a volume ratio of 3:1 concentrated sulfuric acid and concentrated nitric acid mixed with acid for 24 hours, the surface residual acid was washed with deionized water and then treated with potassium permanganate solution for 12 hours, rinse with deionized water and dry, filler is modified glass fiber and modified nano silica having a weight ratio of 5:2, where the modified glass fiber is made of commercially available glass fiber and its weight 10-15 wt.% surface modifier, the surface modifier is composed of KH560 and DOPO are mixed at a weight ratio of 1-2:5-6, the modified nano silica is obtained by mixing commercially available nano silica with a surface treatment agent of 3-4 wt.%, the surface treatment agent is composed of phenol and KH550 according to the weight ratio of 1-2:30 proportion of mixed. An INDEPENDENT CLAIM is also included for preparing graphene modified polyethylene flame retardant composite material comprising firstly weighing the raw material and the raw material for modification treatment according to the proportion, mixing modified raw material and other additives with the polyethylene matrix material, melt mixing according to proportion to obtain the final graphene modified polyethylene flame retardant composite material, where the raw material processing is to modify the commercial glass fiber, (i) drying and grinding the DOPO, mixing with the KH560 stirring in oil bath 180 degrees C according to weight ratio of 1-2:5-6, stirring speed is 600-800 revolutions/minute, stirring for 6 hours, using deionized water to wash for 3-5 times, adding proper de-ionized water at 50 degrees C and hydrolysis for 1-1.5 hours, filtering the hydrolysis product, drying, (ii) using absolute ethyl alcohol, preparing the mass fraction is 10-15 wt.% of ethanol solution, adding glass fiber according to the proportion, ultrasonically processing for 30 minutes, reacting with 80 degrees C under the condition of 4-4.5 hour, filtering the reaction product by anhydrous ethanol for many times, filtering and drying to obtain modified glass fiber.